Effects of Dietary Glucose, Fructose, and Galactose on Hepatopancreatic Enzyme Activities and Body Composition in Carp

Shikata, Takafumi; Iwanaga, Shunsuke; Shimeno, Sadao

doi:10.2331/fishsci.60.613

Cited by 41 publications

(41 citation statements)

References 7 publications

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“…Thus, in European sea bass, a higher induction of liver PK activity by glucose than by starch was observed (Enes et al 2006b), whereas in gibel carp Carassius auratus and Chinese longsnout catfish Leiocassis longirostris, PK activity was significantly higher in fish fed diets containing sucrose than glucose, dextrin or starch (Tan et al 2006). In common carp, comparatively to fish fed a high protein diet without carbohydrates, dietary supplementation with 30% of starch, glucose, or fructose had no effect on hepatic PK activity, whereas supplementation with 30% of galactose depressed PK activity (Shikata et al 1994).…”

Section: Glycolysismentioning

confidence: 75%

“…In common carp, hepatic PFK-1 activity was higher in fish fed diets containing 30% of starch or glucose compared to fish fed a high protein diet without carbohydrates, whereas supplementation with 30% galactose depressed PFK-1 activity (Shikata et al 1994). Pyruvate kinase (EC 2.7.1.40) (Fig.…”

Section: Glycolysismentioning

confidence: 96%

“…Tung and Shiau (1991) also reported no effect of meal frequency (daily ration subdivided into two or six equal feedings per day) on FBPase activity. In common carp, diet supplementation with either 30% of starch, glucose, or galactose depressed hepatic FBPase activity in comparison to those fed a high protein diet without carbohydrates, whereas the same level of dietary fructose had no effect on FBPase activity (Shikata et al 1994).…”

Section: Gluconeogenesismentioning

confidence: 99%

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Nutritional regulation of hepatic glucose metabolism in fish

Enes

Panserat

Kaushik

et al. 2008

Fish Physiol Biochem

420

267

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Glucose plays a key role as energy source in the majority of mammals, but its importance in fish appears limited. Until now, the physiological basis for such apparent glucose intolerance in fish has not been fully understood. A distinct regulation of hepatic glucose utilization (glycolysis) and production (gluconeogenesis) may be advanced to explain the relative inability of fish to efficiently utilize dietary glucose. We summarize here information regarding the nutritional regulation of key enzymes involved in glycolysis (hexokinases, 6-phosphofructo-1-kinase and pyruvate kinase) and gluconeogenesis (phosphoenolpyruvate carboxykinase, fructose-1,6-bisphosphatase and glucose-6-phosphatase) pathways as well as that of the bifunctional enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase. The effect of dietary carbohydrate level and source on the activities and gene expression of the mentioned key enzymes is also discussed. Overall, data strongly suggest that the liver of most fish species is apparently capable of regulating glucose storage. The persistent high level of endogenous glucose production independent of carbohydrate intake level may lead to a putative competition between exogenous (dietary) glucose and endogenous glucose as the source of energy, which may explain the poor dietary carbohydrate utilization in fish.

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Section: Glycolysismentioning

confidence: 75%

Section: Glycolysismentioning

confidence: 96%

Section: Gluconeogenesismentioning

confidence: 99%

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Nutritional regulation of hepatic glucose metabolism in fish

Enes

Panserat

Kaushik

et al. 2008

Fish Physiol Biochem

420

267

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show abstract

“…Similarly, Meton et al (1990) found in sea bass that fish fed on diets of lower energy content had the highest enzyme activity. Shikata et al (1994) reported a sharp reduction in amino acid degrading enzymes (GOT, GPT and arginase) in carp after they were fed carbohydrate-supplemented diets.…”

Section: Resultsmentioning

confidence: 99%

Effects of dietary energy content on the voluntary feed intake and blood parameters of sea bass (Dicentrarchus labrax L.)

D’Agaro

Lanari

2003

Italian Journal of Animal Science

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Energy and protein requirements of sea bass for maximum growth and fasting energy requirements were determined by using three diets containing increasing DE levels and two fish weights. Five hundred and sixteen sea bass were divided in two body weight (BW) classes (A: 67.7 ± 0.85g and B: 128.6 ± 0.88g, mean ± SD live weight) and randomly distributed among 24 tanks. They were fed for 12 weeks on three isoproteic diets characterized by different levels of digestible energy (DE): low energy (LE), 18.6; medium energy (ME), 19.7; and high energy (HE), 22.6 MJ kg -1 dry matter (DM). The entire trial lasted 113 d and was divided into two periods: a feeding trial of 83 d and a fasting trial of 30 d. Specific growth rates decreased in fish fed on the HE diet (P < 0.05), but only in fish weighing 68 g. Voluntary feed intakes and feed conversion ratios were inversely related to dietary energy contents in both weight classes. During the starvation trial, body depletion increased (P<0.05) in fish fed on high-energy diets during the feeding experiment. The gross energy requirements (per day) for maximum growth were 320 and 221 kJ kg -1 BW for fish weighing 68 g and 128 g, respectively. Fasting metabolisms were 60.6 and 54.1 kJ kg -0.83 BW per day for fish weighing 68g and 128g, respectively. It is concluded that growth performance of sea bass appear to be dependent on digestible dietary energy. Gross energy intake, net energy (production) and maintenance requirements of fish were not influenced by dietary treatments.

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“…In the study of fish nutrition found that different fish species have different the capacity of glucose regulation. In omnivorous fish, the capacity of glucose regulation of carp only needed 5h to restore plasma glucose levels [3,42]. Tilapia and catfish (Ictalurus punctatus) needed 6h and 8h to return to normal levels respectively [43].…”

Section: Discussionmentioning

confidence: 99%

Molecular Characterization and Identification of Facilitative Glucose Transporter 2 (GLUT2) and Expression of Related Glycometabolism in Response to Different Starch Levels in Blunt Snout Bream (Megalobrama amblycephala)

Liang¹,

Wilson-Arop²,

Mi³

et al. 2017

Preprint

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Abstract:Facilitative glucose transporters (GLUT) are transmembrane transporter of proteins involved in glucose transport across the plasma membrane. To date, there is no information about glucose transporter 2 (GLUT2) in blunt snout bream (Megalobram aamblycephala). In this study, GLUT2 were cloned and characterized from blunt snout bream, and its-expression in response to diets with different carbohydrate levels (17.1%; 21.8%; 26.4%; 32.0%; 36.3% and 41.9% of dry matter). In this study, the full-length cDNA of GLUT2 was 2577 bp, including a 5'-untranslated region (UTR) of 73 bp, a 3'-UTR of 992 bp, and an open reading frame of 1512 bp, encoding a polypeptide of 503 amino acids with predicted molecular weight of 55.046 kDa and theoretical isoelectric point of 7.52. GLUT2 has twelve across the membrane area locating at 7-29; 71-93; 106-123; 133-155; 168-190; 195-217; 282-301; 316-338; 345-367; 377-399; 412-434; 438-460 aimo acids respectively.Conservative structure domains located at 12-477 aimo acids belonging to sugar porter family major facilitator superfamily (MFS) transporter. The blunt snout bream GLUT2 showed high identity to their orthologs in other fish species and mammals. Quantitative real-time (qRT)-PCR assays revealed that GLUT2 expression was high in the liver, intestine and kidney; highest in the liver. Compared with the control group (17.1%), high dietary carbohydrate levels (32.0%; 36.3% and 41.9%) resulted in high plasma glucose at 3h after Preprints (www.preprints.org) | NOT PEER-REVIEWED |

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Effects of Dietary Glucose, Fructose, and Galactose on Hepatopancreatic Enzyme Activities and Body Composition in Carp

Cited by 41 publications

References 7 publications

Nutritional regulation of hepatic glucose metabolism in fish

Nutritional regulation of hepatic glucose metabolism in fish

Effects of dietary energy content on the voluntary feed intake and blood parameters of sea bass (Dicentrarchus labrax L.)

Molecular Characterization and Identification of Facilitative Glucose Transporter 2 (GLUT2) and Expression of Related Glycometabolism in Response to Different Starch Levels in Blunt Snout Bream (Megalobrama amblycephala)

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